I had an early Christmas recently when I got hold of the DayStar manuals (both) for Mac Classic and SE and for SE/30, LC, LC II, II, IIx, IIcx, IIsi, IIvx, IIvi and Performa 400, 600 (DayStar's title, not mine), because I hoped to settle for once and all that fundamental question about the universe: should the 68882 be removed from the PowerCache when that is used in an SE/30?
Sadly, not so. The manual deals only with the 030 PDS slot-based adapter for the SE/30, and does not mention the adapter that plugs into the 68030's socket. To DayStar the FPU question appears to have been a matter of profound unconcern, because it rates not a mention in 210pp (total) of instruction, and, let's face it, a 68882 is not lightly removed from an SE/30, even if the 68030 is sometimes socketted. While it is conceivable that DayStar's 030 PDS adapter for the SE/30 tacitly disables the 68882 on a PowerCache card, the adapter could equally well have been engineered to disable the logic-board FPU. In sum, though, the need to do so doesn't rate a mention. I can't dispute from experience the long-held opinion that providing two FPUs is Not Done, but there is no corroboration in the manuals.
The manual for the two 68000 Macs is at pains to stress that only the P33 and P34 PowerCache cards (not the card without a type number) will work in the SE and Classic, and lets slip that those cards can also be used in the Colour Classic (with the LC PDS adapter). With all these revelations it might be expected that any special requirements for the SE/30 would have been mentioned, but there is nary a whisper. But is the universe still safe?
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